JPH0845228A - Tape cassette - Google Patents

Abstract

(57) [Abstract] [Purpose] The spring that constantly urges the reel lock member in the locking direction is displaced, avoiding the possibility of being disengaged from the spring locking guide plate and the spring locking projection, and the reel is surely secured. To provide a tape cassette that can be locked. A ratchet portion is provided on the outer peripheral edge of each reel, and a reel lock member 5 having a pair of protrusions is slidably attached. The reel lock member 5 is connected to the ratchet portion and the protrusion by elastic force of a spring 6. In the tape cassette that is always urged in the direction P in which they engage with each other, a pair of spring locking guide plates 11 are provided on the lower half 3 and a pair of spring pressing plates 12 are provided on the upper half 2. The center of the spring 6 is locked to the reel lock member 5, both ends 61 of the spring 6 are locked to the tip 11a of the spring lock guide plate 11, and the lower end edge 12a of the spring retainer plate 12 is used. It is characterized by being prevented from moving upward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette, and more specifically, a spring for constantly urging a reel lock member for locking the rotation of a reel in the locking direction causes a positional shift as it is used, and a spring is provided on the lower half. The present invention relates to a tape cassette capable of reliably locking the reel when the tape cassette is not in use by avoiding the risk of coming off from the spring locking guide plate and the spring locking projection of the reel lock member.

[0002]

2. Description of the Related Art As a conventional tape cassette, as shown in FIG. 9, a pair of reels 4 and 4 in which a magnetic tape is wound inside a cassette body 1 consisting of an upper half 2 and a lower half 3.
To accommodate the ratchet portion 41 on the outer peripheral edge of each reel 4.
And a reel lock member 5 ′ having a pair of protrusions 51 ′, 51 ′ is slidably attached to one side between the reels 4 and 4, and the reel lock member 5 ′ is attached to a spring 6 ′. There is a structure in which the ratchet portion 41 and the protruding portion 51 ′ are constantly urged in the locking direction P in which the ratchet portion 41 and the protruding portion 51 ′ mesh with each other.

In the tape cassette, as shown in FIGS. 10 and 11, the pair of protrusions 51 'and 5'
A pair of spring members 1'is provided on the tip of the reel lock member 5'in two steps, and guides the slide of the reel lock member 5'and positions the spring 6'on the inner surface of the cassette body 1. Stop guide plates 11 ', 11' are provided, the spring 6 is a curved mountain-shaped plate spring, and the top of the plate spring is in contact with the rear end of the reel lock member 5 '. The leaf spring whose bottom portion is in contact with the inner wall of the rear end of the cassette body 1 is mainly used.

In the above tape cassette,
At the time of use, the reels 4 and 4 shown in FIG.
When the tape cassette is loaded into the cassette deck from the locked state, the reel lock member 5 ′ is slid in the unlocking direction Q by a pin on the deck side for sliding the reel lock member 5 ′, As shown in FIG. 11, the ratchet portions 41, 41 of the pair of reels 4, 4 are disengaged from the protrusions 51 ', 51' of the reel lock member 5 ', and the pair of reels 4, 4 are uncoupled. Is unlocked. At this time, the protrusions 51 ′ and 51 ′ formed in two forks are elastically deformed by contacting the outer surfaces of the protrusions 51 ′ and 51 ′ with the inner surfaces of the pair of spring locking guide plates 11 ′ and 11 ′. Then, it is closed and slid in the unlock direction Q.

However, in the above tape cassette,
By repeated use, the protrusions 51 ′, 51 ′ formed on the two forks of the reel lock member 5 ′ are repeatedly elastically deformed, so that the protrusions 51 ′, 51 ′ are deformed due to fatigue and the ratchet portion. 41, 41 may not be meshed with each other, or the protrusions 51 ', 51' may be broken, so that the reels 4, 4 cannot be locked and the debris may hinder the running of the tape. In addition, the protrusions 51 ′ and 51 ′ formed on the fork of the reel lock member 5 ′.
Since the tip has an elongated shape, it is difficult to fill the elongated tip with the resin in the mold at the time of molding, which is not preferable in terms of productivity, and if the molding is not complete, the protrusion 51 ′, There were also problems such as early fatigue of 51 '.

Therefore, the inventor of the present invention, as a tape cassette avoiding the above-mentioned problems of the tape cassette, shows the reel lock member 5'of the tape cassette shown in FIG. 9 and its periphery as shown in FIGS. The improved tape cassette was developed. In such a tape cassette, the reel lock member 5 is provided with a spring lock projection 52, and the pair of spring lock guide plates 1 for guiding the slide of the reel lock member 5 are provided on the inner surface of the cassette body 1.
1, 11 are provided, and the spring 6 that constantly urges the reel lock member 5 in the locking direction P is a torsion spring, and the coil portion 62 formed at the center of the torsion spring is the spring engagement member. The both ends 61, 61 of the spring locking guide plate 11 are locked to the stopper projection 52.
The front end portions 11a and 11a of 11 are locked respectively.

[0007]

In the tape cassette as described above, the spring is used after the tape cassette is repeatedly used, that is, after the reel lock member 5 is repeatedly slid in the locking direction P and the unlocking direction Q. 6 is displaced upward, and the both end portions 61, 61 of the spring 6 are engaged with the upper edge 11 of the spring engaging portion 11, 11.
b, 11b, or the coil portion 6 of the spring 6
2 is disengaged from above the spring locking projection 52 of the reel lock member 5, and it becomes impossible to constantly urge the reel lock member 5 in the lock direction P. When the tape cassette is not used, There is a fear that the reels 4 and 4 cannot be reliably locked.

Therefore, an object of the present invention is that the spring for constantly urging the reel lock member for locking the rotation of the reel in the locking direction is displaced as it is used, and the spring locking provided on the lower half is projected. An object of the present invention is to provide a tape cassette capable of reliably locking the reel when the tape cassette is not in use by avoiding the risk of the guide plate and the reel lock member being disengaged from the spring locking projections.

[0009]

According to the present invention, a pair of reels 4 and 4 wound with a magnetic tape is housed in a cassette body 1 composed of an upper half 2 and a lower half 3, and each of the reels 4 described above is accommodated.
A ratchet portion 41 is provided on the outer peripheral edge of the reel lock member, and a reel lock member 5 having a pair of protrusions 51, 51 is slidably mounted on one side between the reels 4 and 4, and the reel lock member 5 is In the tape cassette in which the elastic force of the spring 6 constantly biases the ratchet portion 41 and the protrusion 51 in the locking direction P in which the ratchet portion 41 and the protrusion 51 are engaged with each other, the reel lock member 5 is provided with a spring locking protrusion 52. , A pair of spring locking guide plates 11 for guiding the slide of the reel lock member 5 on the inner surface of the cassette body 1,
A pair of spring retainer plates 12 and 12 are provided on the upper half 2 so as to face the outside or the inside of the pair of spring locking guide plates 11 and 11, respectively. The center of the spring 6 is locked to the reel lock member 5, and both ends 61, 61 of the spring 6 are locked.
Is the tip portions 11a, 11 of the spring locking guide plates 11, 11.
a, and the spring 6 is provided at the lower end edges 12a and 12a of the pair of spring pressing plates 12 and 12, respectively.
The above object is achieved by providing a tape cassette characterized by being prevented from moving upward by the above.

[0010]

According to the tape cassette of the present invention, even when the tape cassette is repeatedly used, the spring for constantly urging the reel lock member in the locking direction is pressed to prevent the spring from being displaced upward. can do.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tape cassette of the present invention will be described below with reference to the drawings. 1 to 4 show an embodiment of the tape cassette of the present invention. FIG. 1 is a perspective view showing the appearance thereof, and FIG. 2 is a reel in a locked state.
FIG. 3 is a perspective view showing the reel lock member, the spring, and the cassette body with a part of the cassette body omitted. FIG. 3 shows the reel lock member, the spring, and the cassette body with a part of the cassette body omitted when the reel is locked. Sectional view shown in FIG.
FIG. 6 is a perspective view showing a reel lock member, a spring, and a reel in a locked state of the reel while omitting a part of the reel.

As shown in FIG. 1, the tape cassette of this embodiment accommodates a pair of reels 4 and 4 wound with a magnetic tape in a cassette body 1 composed of an upper half 2 and a lower half 3, and each of the above respective A ratchet portion 41 is provided on the outer peripheral edge of the reel 4, and a reel lock member 5 having a pair of protrusions 51, 51 is slidably attached to one side between the reels 4 and 4, and the reel lock member 5 is provided. The elastic force of the spring 6 constantly biases the ratchet portion 41 and the protrusion 51 in the locking direction P in which they mesh with each other.

Thus, in the tape cassette of this embodiment, as shown in FIGS. 2 to 4, the reel lock member 5 is provided with the spring locking projection 52, and the inner surface of the cassette body 1 is provided. A pair of spring locking guide plates 11, 11 for guiding the slide of the reel lock member 5 are provided on the lower half 3 so as to project therefrom.
11 A pair of spring pressing plates 12 and 12 are provided on the upper half 2 so as to face the outside or inside, respectively, and the center of the spring 6 is locked by the reel lock member 5. , Both ends 61, 61 of which are respectively locked to the tips of the spring locking guide plates 11, 11, and the spring 6 is formed by the lower end edges 12a, 12a of the pair of spring pressing plates 12, 12. It has been blocked from moving upwards.

To further explain this embodiment, as shown in FIGS. 2 to 4, the reel lock member 5 has a pair of protrusions 51, 51 formed on both sides thereof and a hole 53 formed on the lower surface thereof. Further, the front portion has a substantially isosceles triangular prism shape, and the plate-shaped rear portion is provided with the spring locking projection 52 and the spring guide piece 54 protruding therefrom. A pair of the protrusions 51, 51
Is integrally provided on the lower ends of the above-mentioned isosceles triangular prism that are equal to each other so as not to elastically deform,
The tip portions of the reel lock members 5 are in plan view when the reel lock member 5 is viewed from above or below.
It is provided so as to be located within the outline of the.

As shown in FIGS. 2 to 4, the spring 6 has a coil portion 62 wound around the center thereof in a vine shape.
The end of the coil portion 62 and the start end of the coil portion 62 are linearly extended in a direction facing each other by 180 °,
It is a torsion spring 61. The coil portion 62 is formed such that the inner diameter thereof is slightly larger than the outer diameter of the spring locking projection 52, and the pair of both end portions 61, 6 are provided.
No. 1 is bent by approximately 90 ° in the unlocking direction Q when the spring 6 is incorporated in the tape cassette. The spring 6 is arranged so that the contact point between the coil portion 62 and the both end portions 61, 61 is sandwiched in the gap between the spring guide piece 54 and the spring locking projection 52 of the reel lock member 5. The both ends 61, 61 are locked by the locking projections 52, and are respectively locked by the tip portions 11a, 11a of the spring guide locking plates 11, 11.

The pair of spring locking guide plates 11 and 11 are
As described above, the both end portions 61, 61 of the spring 6 are locked and the sliding movement of the reel lock member 5 is guided. As shown in FIGS. The half 3 is provided so as to project from the inner surface of the half 3 substantially in parallel with the width of the reel lock member 5 and the tip portions 11a, 11a thereof are the end portions 61, 61 of the spring 6 in the locked state of the reel lock member 5. It is designed to come to the position.

A pair of spring pressing plates 12, 12 are provided so as to project from the inner surface of the upper half 2 of the cassette body 1, and the spring pressing plates 12, 12 are outside the spring locking guide plates 11, 11. Facing the bottom edge 12a, 12
a is the upper edge 11b, 1 of the spring locking guide plate 11, 11.
It is formed below 1b. Further, a reel lock member pressing plate 13 is projected from the inner surface of the upper half 2 of the cassette body 1.

Next, the operation of the reel lock member 5 when the tape cassette of the present embodiment having the above-mentioned structure is used will be described. When the tape cassette is loaded into the cassette deck from the locked state of the reels 4 and 4 shown in FIG. 5, a pin (not shown) on the deck side for sliding the reel lock member 5 moves to the lower position. It is inserted into the hole 53 through a hole (not shown) provided in the half 3. The reel lock member 5 is slid in the unlocking direction Q by the pin, and as shown in FIG. 6, the ratchet portions 41, 41 of the pair of reels 4, 4 and the pair of protrusions of the reel lock member 5. The parts 51, 51 are disengaged from each other, the locked state of the pair of reels 4, 4 is released, and the reels 4, 4 are unlocked, so that the pair of reels 4, 4 can rotate.

At this time, the sliding movement of the reel lock member 5 is guided in the lateral direction by the spring locking guide plates 11 and 11, and is guided in the vertical direction by the reel lock member pressing plate 13 and the lower half. Further, even if the reel lock member 5 is repeatedly slid, the spring 6 is prevented from moving upward by the lower end edges 12a and 12a of the pair of spring pressing plates 12 and 12, so that the spring 6 is prevented from moving upward. The both end portions 61, 61 of the spring engagement guide plates 11, 11 are disengaged from the upper end edges 11b, 11b of the spring engagement guide plates 11, 11,
The coil portion 62 of the spring 6 is prevented from coming off the spring locking protrusion 52 of the reel lock member 5.

When the use of the above tape cassette is completed,
From the unlocked state of the reels 4 and 4 shown in FIG. 6, the pin on the deck side is pulled out from the hole 53, and the reel lock member 5 is slid in the lock direction P by the elastic restoring force of the spring 6. As shown in FIG. 5, the ratchet portions 41, 41 of the reels 4, 4 are paired.
And the pair of protrusions 51, 5 of the reel lock member 5
1 is engaged with each other, and the pair of reels 4 and 4 are locked.

The present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, the pair of spring pressing plates 12 and 12 are replaced by the pair of spring locking guide plates 1.
The pair of spring pressing plates 12 and 12 are provided so as to face the outer sides of the reels 1 and 11 in parallel with each other by the width of the reel lock member 5 from the inner surface of the upper half 2 and are provided outside thereof. A pair of the spring locking guide plates 11, 11 may be provided so as to face each other. In this case, the sliding movement of the reel lock member 5 is guided laterally by the pair of spring pressing plates 12, 12. Like Regarding other points,
Modifications can be made without departing from the spirit of the present invention. The tape cassette of the present invention can be used as a tape cassette such as a VHS video tape cassette and an 8 mm VTR tape cassette, and it goes without saying that the type of tape cassette is not limited.

[0022]

According to the present invention, according to the tape cassette, the spring for constantly urging the reel lock member for locking the rotation of the reel in the locking direction is displaced as it is used, and is projected on the lower half. Avoid the risk of coming off from the spring locking guide plate and the spring locking projections of the reel lock member,
The reel can be securely locked when the tape cassette is not used.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of an embodiment of a tape cassette of the present invention.

FIG. 2 is a perspective view showing a reel lock member, a spring, and a cassette main body under a locked state of a reel of a tape cassette according to an embodiment of the present invention, with a part of the cassette main body omitted.

FIG. 3 is a cross-sectional view showing a reel lock member, a spring, and a cassette body in a locked state of a reel of an embodiment of the tape cassette of the present invention, with a part of the cassette body omitted.

FIG. 4 is a perspective view showing a reel lock member, a spring, and a reel in a locked state of a reel of a tape cassette according to an embodiment of the present invention with a part of the reel omitted.

FIG. 5 is a plan view of the reel lock member, the spring, the reel, and the cassette body, which are partially omitted, when the reel is locked according to the embodiment of the tape cassette of the present invention.

FIG. 6 is a plan view of the reel lock member, the spring, the reel, and the cassette body when the reel of the tape cassette according to the embodiment of the present invention is unlocked, as seen from above.

FIG. 7 is a perspective view showing a reel lock member, a spring, and a cassette main body under a locked state of a reel of a tape cassette having no pair of spring holding plates on the inner surface of the cassette main body, with a part of the cassette main body omitted. .

FIG. 8 is a cross-sectional view showing a reel lock member, a spring, and a cassette main body under a locked state of a reel of a tape cassette having no pair of spring holding plates on the inner surface of the cassette main body, with a part of the cassette main body omitted. .

FIG. 9 is a perspective view showing an appearance of a conventional tape cassette.

FIG. 10 is a plan view of a conventional tape cassette with a reel locked, in which a reel lock member, a spring, a reel, and a cassette body are partially omitted when viewed from above.

FIG. 11 is a plan view of a reel of a conventional tape cassette in an unlocked state, in which a reel lock member, a spring, a reel, and a cassette body are partially omitted when viewed from above.

[Explanation of symbols]

 1 Cassette Main Body 11 Spring Locking Guide Plate 11a (Spring Locking Guide Plate) Tip 2 Upper Half 3 Lower Half 4 Reel 41 Ratchet 5 Reel Lock Member 51 Projection 52 Spring Locking Protrusion 6 Spring 61 Both Ends P Lock direction

Claims (1)

[Claims] 1. A pair of reels 4, each having a magnetic tape wound inside a cassette body 1 composed of an upper half 2 and a lower half 3.
4 is stored, and the ratchet portion 4 is provided on the outer peripheral edge of each reel 4.
1 is provided, and a reel lock member 5 having a pair of protrusions 51, 51 is slidably mounted on one side between the reels 4 and 4, and the reel lock member 5 is attached by the elastic force of a spring 6. , The ratchet portion 41 and the protruding portion 51
In a tape cassette which is always biased in a locking direction P in which is engaged with, the reel lock member 5 is provided with a spring locking projection 52, and the reel lock member 5 slides on the inner surface of the cassette body 1. Pair of spring locking guide plates 1 for guiding
1, 11 project from the lower half 3, and the pair of spring pressing plates 12, 12 project toward the upper half 2 so as to face the outside or the inside of the pair of spring locking guide plates 11, 11, respectively. The spring 6 has its central portion locked to the reel lock member 5 and its both ends 61, 61 respectively attached to the tip portions 11a, 11a of the spring locking guide plates 11, 11 respectively. A tape cassette characterized in that it is locked, and the spring 6 is prevented from moving upward by the lower end edges 12a, 12a of the pair of spring pressing plates 12, 12.